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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.execution;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.Executor;
<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.ExecutorService;
<a class="jxr_linenumber" name="20" href="#20">20</a>  
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.bootstrap.ServerBootstrap;
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channel;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelDownstreamHandler;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelEvent;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandler;
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandler.Sharable;
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandlerContext;
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelPipeline;
<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelPipelineFactory;
<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelState;
<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelStateEvent;
<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelUpstreamHandler;
<a class="jxr_linenumber" name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channels;
<a class="jxr_linenumber" name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.util.ExternalResourceReleasable;
<a class="jxr_linenumber" name="35" href="#35">35</a>  
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * Forwards an upstream {@link ChannelEvent} to an {@link Executor}.</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> * {@link ExecutionHandler} is often used when your {@link ChannelHandler}</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> * performs a blocking operation that takes long time or accesses a resource</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> * which is not CPU-bound business logic such as DB access.  Running such</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> * operations in a pipeline without an {@link ExecutionHandler} will result in</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * unwanted hiccup during I/O because an I/O thread cannot perform I/O until</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> * your handler returns the control to the I/O thread.</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_javadoccomment"> * In most cases, an {@link ExecutionHandler} is coupled with an</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_javadoccomment"> * {@link OrderedMemoryAwareThreadPoolExecutor} because it guarantees the</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment"> * correct event execution order and prevents an {@link OutOfMemoryError}</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> * under load:</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_javadoccomment"> * public class DatabaseGatewayPipelineFactory implements {@link ChannelPipelineFactory} {</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment"> *     &lt;b&gt;private final {@link ExecutionHandler} executionHandler;&lt;/b&gt;</em>
<a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment"> *     public DatabaseGatewayPipelineFactory({@link ExecutionHandler} executionHandler) {</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment"> *         this.executionHandler = executionHandler;</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment"> *     }</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="59" href="#59">59</a>  <em class="jxr_javadoccomment"> *     public {@link ChannelPipeline} getPipeline() {</em>
<a class="jxr_linenumber" name="60" href="#60">60</a>  <em class="jxr_javadoccomment"> *         return {@link Channels}.pipeline(</em>
<a class="jxr_linenumber" name="61" href="#61">61</a>  <em class="jxr_javadoccomment"> *                 new DatabaseGatewayProtocolEncoder(),</em>
<a class="jxr_linenumber" name="62" href="#62">62</a>  <em class="jxr_javadoccomment"> *                 new DatabaseGatewayProtocolDecoder(),</em>
<a class="jxr_linenumber" name="63" href="#63">63</a>  <em class="jxr_javadoccomment"> *                 &lt;b&gt;executionHandler, // Must be shared&lt;/b&gt;</em>
<a class="jxr_linenumber" name="64" href="#64">64</a>  <em class="jxr_javadoccomment"> *                 new DatabaseQueryingHandler());</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>  <em class="jxr_javadoccomment"> *     }</em>
<a class="jxr_linenumber" name="66" href="#66">66</a>  <em class="jxr_javadoccomment"> * }</em>
<a class="jxr_linenumber" name="67" href="#67">67</a>  <em class="jxr_javadoccomment"> * ...</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment"> * public static void main(String[] args) {</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment"> *     {@link ServerBootstrap} bootstrap = ...;</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment"> *     ...</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment"> *     &lt;b&gt;{@link ExecutionHandler} executionHandler = new {@link ExecutionHandler}(</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment"> *             new {@link OrderedMemoryAwareThreadPoolExecutor}(16, 1048576, 1048576))</em>
<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment"> *     bootstrap.setPipelineFactory(</em>
<a class="jxr_linenumber" name="75" href="#75">75</a>  <em class="jxr_javadoccomment"> *             new DatabaseGatewayPipelineFactory(executionHandler));&lt;/b&gt;</em>
<a class="jxr_linenumber" name="76" href="#76">76</a>  <em class="jxr_javadoccomment"> *     ...</em>
<a class="jxr_linenumber" name="77" href="#77">77</a>  <em class="jxr_javadoccomment"> *     bootstrap.bind(...);</em>
<a class="jxr_linenumber" name="78" href="#78">78</a>  <em class="jxr_javadoccomment"> *     ...</em>
<a class="jxr_linenumber" name="79" href="#79">79</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment"> *     while (!isServerReadyToShutDown()) {</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment"> *         // ... wait ...</em>
<a class="jxr_linenumber" name="82" href="#82">82</a>  <em class="jxr_javadoccomment"> *     }</em>
<a class="jxr_linenumber" name="83" href="#83">83</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="84" href="#84">84</a>  <em class="jxr_javadoccomment"> *     bootstrap.releaseExternalResources();</em>
<a class="jxr_linenumber" name="85" href="#85">85</a>  <em class="jxr_javadoccomment"> *     &lt;b&gt;executionHandler.releaseExternalResources();&lt;/b&gt;</em>
<a class="jxr_linenumber" name="86" href="#86">86</a>  <em class="jxr_javadoccomment"> * }</em>
<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment"> * Please refer to {@link OrderedMemoryAwareThreadPoolExecutor} for the</em>
<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment"> * detailed information about how the event order is guaranteed.</em>
<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="92" href="#92">92</a>  <em class="jxr_javadoccomment"> * &lt;h3&gt;SEDA (Staged Event-Driven Architecture)&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="93" href="#93">93</a>  <em class="jxr_javadoccomment"> * You can implement an alternative thread model such as</em>
<a class="jxr_linenumber" name="94" href="#94">94</a>  <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/Staged_event-driven_architecture" target="alexandria_uri">http://en.wikipedia.org/wiki/Staged_event-driven_architecture</a>"&gt;SEDA&lt;/a&gt;</em>
<a class="jxr_linenumber" name="95" href="#95">95</a>  <em class="jxr_javadoccomment"> * by adding more than one {@link ExecutionHandler} to the pipeline.</em>
<a class="jxr_linenumber" name="96" href="#96">96</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="97" href="#97">97</a>  <em class="jxr_javadoccomment"> * &lt;h3&gt;Using other {@link Executor} implementation&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="98" href="#98">98</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="99" href="#99">99</a>  <em class="jxr_javadoccomment"> * Although it's recommended to use {@link OrderedMemoryAwareThreadPoolExecutor},</em>
<a class="jxr_linenumber" name="100" href="#100">100</a> <em class="jxr_javadoccomment"> * you can use other {@link Executor} implementations.  However, you must note</em>
<a class="jxr_linenumber" name="101" href="#101">101</a> <em class="jxr_javadoccomment"> * that other {@link Executor} implementation might break your application</em>
<a class="jxr_linenumber" name="102" href="#102">102</a> <em class="jxr_javadoccomment"> * because they often do not maintain event execution order nor interact with</em>
<a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_javadoccomment"> * I/O threads to control the incoming traffic and avoid {@link OutOfMemoryError}.</em>
<a class="jxr_linenumber" name="104" href="#104">104</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="105" href="#105">105</a> <em class="jxr_javadoccomment"> * @apiviz.landmark</em>
<a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_javadoccomment"> * @apiviz.has java.util.concurrent.ThreadPoolExecutor</em>
<a class="jxr_linenumber" name="107" href="#107">107</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="108" href="#108">108</a> @Sharable
<a class="jxr_linenumber" name="109" href="#109">109</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/handler/execution/ExecutionHandler.html">ExecutionHandler</a> <strong class="jxr_keyword">implements</strong> ChannelUpstreamHandler, ChannelDownstreamHandler, <a href="../../../../../org/jboss/netty/util/ExternalResourceReleasable.html">ExternalResourceReleasable</a> {
<a class="jxr_linenumber" name="110" href="#110">110</a> 
<a class="jxr_linenumber" name="111" href="#111">111</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Executor executor;
<a class="jxr_linenumber" name="112" href="#112">112</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> handleDownstream;
<a class="jxr_linenumber" name="113" href="#113">113</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> handleUpstream;
<a class="jxr_linenumber" name="114" href="#114">114</a> 
<a class="jxr_linenumber" name="115" href="#115">115</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="116" href="#116">116</a> <em class="jxr_javadoccomment">     * Creates a new instance with the specified {@link Executor}.</em>
<a class="jxr_linenumber" name="117" href="#117">117</a> <em class="jxr_javadoccomment">     * Specify an {@link OrderedMemoryAwareThreadPoolExecutor} if unsure.</em>
<a class="jxr_linenumber" name="118" href="#118">118</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="119" href="#119">119</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/handler/execution/ExecutionHandler.html">ExecutionHandler</a>(Executor executor) {
<a class="jxr_linenumber" name="120" href="#120">120</a>         <strong class="jxr_keyword">this</strong>(executor, false, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="121" href="#121">121</a>     }
<a class="jxr_linenumber" name="122" href="#122">122</a> 
<a class="jxr_linenumber" name="123" href="#123">123</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="124" href="#124">124</a> <em class="jxr_javadoccomment">     * Use {@link #ExecutionHandler(Executor, boolean, boolean)}</em>
<a class="jxr_linenumber" name="125" href="#125">125</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="126" href="#126">126</a> <em class="jxr_javadoccomment">     * {@link Deprecated}</em>
<a class="jxr_linenumber" name="127" href="#127">127</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="128" href="#128">128</a>     @Deprecated
<a class="jxr_linenumber" name="129" href="#129">129</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/handler/execution/ExecutionHandler.html">ExecutionHandler</a>(Executor executor, <strong class="jxr_keyword">boolean</strong> handleDownstream) {
<a class="jxr_linenumber" name="130" href="#130">130</a>         <strong class="jxr_keyword">this</strong>(executor, handleDownstream, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="131" href="#131">131</a>     }
<a class="jxr_linenumber" name="132" href="#132">132</a> 
<a class="jxr_linenumber" name="133" href="#133">133</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="134" href="#134">134</a> <em class="jxr_javadoccomment">     * Creates a new instance with the specified {@link Executor}.</em>
<a class="jxr_linenumber" name="135" href="#135">135</a> <em class="jxr_javadoccomment">     * Specify an {@link OrderedMemoryAwareThreadPoolExecutor} if unsure.</em>
<a class="jxr_linenumber" name="136" href="#136">136</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="137" href="#137">137</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../../org/jboss/netty/handler/execution/ExecutionHandler.html">ExecutionHandler</a>(Executor executor, <strong class="jxr_keyword">boolean</strong> handleDownstream, <strong class="jxr_keyword">boolean</strong> handleUpstream) {
<a class="jxr_linenumber" name="138" href="#138">138</a>         <strong class="jxr_keyword">if</strong> (executor == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="139" href="#139">139</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"executor"</span>);
<a class="jxr_linenumber" name="140" href="#140">140</a>         }
<a class="jxr_linenumber" name="141" href="#141">141</a>         <strong class="jxr_keyword">if</strong> (!handleDownstream &amp;&amp; !handleUpstream) {
<a class="jxr_linenumber" name="142" href="#142">142</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"You must handle at least handle one event type"</span>);
<a class="jxr_linenumber" name="143" href="#143">143</a>         }
<a class="jxr_linenumber" name="144" href="#144">144</a>         <strong class="jxr_keyword">this</strong>.executor = executor;
<a class="jxr_linenumber" name="145" href="#145">145</a>         <strong class="jxr_keyword">this</strong>.handleDownstream = handleDownstream;
<a class="jxr_linenumber" name="146" href="#146">146</a>         <strong class="jxr_keyword">this</strong>.handleUpstream = handleUpstream;
<a class="jxr_linenumber" name="147" href="#147">147</a>     }
<a class="jxr_linenumber" name="148" href="#148">148</a> 
<a class="jxr_linenumber" name="149" href="#149">149</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="150" href="#150">150</a> <em class="jxr_javadoccomment">     * Returns the {@link Executor} which was specified with the constructor.</em>
<a class="jxr_linenumber" name="151" href="#151">151</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="152" href="#152">152</a>     <strong class="jxr_keyword">public</strong> Executor getExecutor() {
<a class="jxr_linenumber" name="153" href="#153">153</a>         <strong class="jxr_keyword">return</strong> executor;
<a class="jxr_linenumber" name="154" href="#154">154</a>     }
<a class="jxr_linenumber" name="155" href="#155">155</a> 
<a class="jxr_linenumber" name="156" href="#156">156</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="157" href="#157">157</a> <em class="jxr_javadoccomment">     * Shuts down the {@link Executor} which was specified with the constructor</em>
<a class="jxr_linenumber" name="158" href="#158">158</a> <em class="jxr_javadoccomment">     * and wait for its termination.</em>
<a class="jxr_linenumber" name="159" href="#159">159</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="160" href="#160">160</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> releaseExternalResources() {
<a class="jxr_linenumber" name="161" href="#161">161</a>         Executor executor = getExecutor();
<a class="jxr_linenumber" name="162" href="#162">162</a>         <strong class="jxr_keyword">if</strong> (executor instanceof ExecutorService) {
<a class="jxr_linenumber" name="163" href="#163">163</a>             ((ExecutorService) executor).shutdown();
<a class="jxr_linenumber" name="164" href="#164">164</a>         }
<a class="jxr_linenumber" name="165" href="#165">165</a>         <strong class="jxr_keyword">if</strong> (executor instanceof ExternalResourceReleasable) {
<a class="jxr_linenumber" name="166" href="#166">166</a>             ((<a href="../../../../../org/jboss/netty/util/ExternalResourceReleasable.html">ExternalResourceReleasable</a>) executor).releaseExternalResources();
<a class="jxr_linenumber" name="167" href="#167">167</a>         }
<a class="jxr_linenumber" name="168" href="#168">168</a>     }
<a class="jxr_linenumber" name="169" href="#169">169</a> 
<a class="jxr_linenumber" name="170" href="#170">170</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleUpstream(
<a class="jxr_linenumber" name="171" href="#171">171</a>             <a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> context, <a href="../../../../../org/jboss/netty/channel/ChannelEvent.html">ChannelEvent</a> e) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="172" href="#172">172</a>         <strong class="jxr_keyword">if</strong> (handleUpstream) {
<a class="jxr_linenumber" name="173" href="#173">173</a>             executor.execute(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/handler/execution/ChannelUpstreamEventRunnable.html">ChannelUpstreamEventRunnable</a>(context, e, executor));
<a class="jxr_linenumber" name="174" href="#174">174</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="175" href="#175">175</a>             context.sendUpstream(e);
<a class="jxr_linenumber" name="176" href="#176">176</a>         }
<a class="jxr_linenumber" name="177" href="#177">177</a>     }
<a class="jxr_linenumber" name="178" href="#178">178</a> 
<a class="jxr_linenumber" name="179" href="#179">179</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleDownstream(
<a class="jxr_linenumber" name="180" href="#180">180</a>             <a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../org/jboss/netty/channel/ChannelEvent.html">ChannelEvent</a> e) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="181" href="#181">181</a>         <em class="jxr_comment">// check if the read was suspend</em>
<a class="jxr_linenumber" name="182" href="#182">182</a>         <strong class="jxr_keyword">if</strong> (!handleReadSuspend(ctx, e)) {
<a class="jxr_linenumber" name="183" href="#183">183</a>             <strong class="jxr_keyword">if</strong> (handleDownstream) {
<a class="jxr_linenumber" name="184" href="#184">184</a>                 executor.execute(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/jboss/netty/handler/execution/ChannelDownstreamEventRunnable.html">ChannelDownstreamEventRunnable</a>(ctx, e, executor));
<a class="jxr_linenumber" name="185" href="#185">185</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="186" href="#186">186</a>                 ctx.sendDownstream(e);
<a class="jxr_linenumber" name="187" href="#187">187</a>             }
<a class="jxr_linenumber" name="188" href="#188">188</a>         }
<a class="jxr_linenumber" name="189" href="#189">189</a>     }
<a class="jxr_linenumber" name="190" href="#190">190</a> 
<a class="jxr_linenumber" name="191" href="#191">191</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="192" href="#192">192</a> <em class="jxr_javadoccomment">     * Handle suspended reads</em>
<a class="jxr_linenumber" name="193" href="#193">193</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="194" href="#194">194</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> handleReadSuspend(<a href="../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../org/jboss/netty/channel/ChannelEvent.html">ChannelEvent</a> e) {
<a class="jxr_linenumber" name="195" href="#195">195</a>         <strong class="jxr_keyword">if</strong> (e instanceof ChannelStateEvent) {
<a class="jxr_linenumber" name="196" href="#196">196</a>             <a href="../../../../../org/jboss/netty/channel/ChannelStateEvent.html">ChannelStateEvent</a> cse = (ChannelStateEvent) e;
<a class="jxr_linenumber" name="197" href="#197">197</a>             <strong class="jxr_keyword">if</strong> (cse.getState() == ChannelState.INTEREST_OPS &amp;&amp;
<a class="jxr_linenumber" name="198" href="#198">198</a>                 (((Integer) cse.getValue()).intValue() &amp; Channel.OP_READ) != 0) {
<a class="jxr_linenumber" name="199" href="#199">199</a> 
<a class="jxr_linenumber" name="200" href="#200">200</a>                 <em class="jxr_comment">// setReadable(true) requested</em>
<a class="jxr_linenumber" name="201" href="#201">201</a>                 <strong class="jxr_keyword">boolean</strong> readSuspended = ctx.getAttachment() != <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="202" href="#202">202</a>                 <strong class="jxr_keyword">if</strong> (readSuspended) {
<a class="jxr_linenumber" name="203" href="#203">203</a>                     <em class="jxr_comment">// Drop the request silently if MemoryAwareThreadPool has</em>
<a class="jxr_linenumber" name="204" href="#204">204</a>                     <em class="jxr_comment">// set the flag.</em>
<a class="jxr_linenumber" name="205" href="#205">205</a>                     e.getFuture().setSuccess();
<a class="jxr_linenumber" name="206" href="#206">206</a>                     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="207" href="#207">207</a>                 }
<a class="jxr_linenumber" name="208" href="#208">208</a>             }
<a class="jxr_linenumber" name="209" href="#209">209</a>         }
<a class="jxr_linenumber" name="210" href="#210">210</a> 
<a class="jxr_linenumber" name="211" href="#211">211</a>         <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="212" href="#212">212</a>     }
<a class="jxr_linenumber" name="213" href="#213">213</a> }
</pre>
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